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/*
Copyright (C) 2014-2018 Carl Hetherington <cth@carlh.net>
This file is part of libdcp.
libdcp is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
libdcp is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with libdcp. If not, see <http://www.gnu.org/licenses/>.
In addition, as a special exception, the copyright holders give
permission to link the code of portions of this program with the
OpenSSL library under certain conditions as described in each
individual source file, and distribute linked combinations
including the two.
You must obey the GNU General Public License in all respects
for all of the code used other than OpenSSL. If you modify
file(s) with this exception, you may extend this exception to your
version of the file(s), but you are not obligated to do so. If you
do not wish to do so, delete this exception statement from your
version. If you delete this exception statement from all source
files in the program, then also delete it here.
*/
/** @file src/asset.cc
* @brief Asset class.
*/
#include "raw_convert.h"
#include "asset.h"
#include "util.h"
#include "exceptions.h"
#include "dcp_assert.h"
#include "compose.hpp"
#include "pkl.h"
#include <libxml++/libxml++.h>
#include <boost/algorithm/string.hpp>
using std::string;
using boost::function;
using boost::shared_ptr;
using boost::optional;
using namespace dcp;
/** Create an Asset with a randomly-generated ID */
Asset::Asset ()
{
}
/** Create an Asset from a given file.
* @param file File name.
*/
Asset::Asset (boost::filesystem::path file)
: _file (file)
{
}
/** Create an Asset from a given file with a known ID.
* @param file File name.
* @param id ID.
*/
Asset::Asset (string id, boost::filesystem::path file)
: Object (id)
, _file (file)
{
}
void
Asset::add_to_pkl (shared_ptr<PKL> pkl, boost::filesystem::path root) const
{
DCP_ASSERT (_file);
optional<boost::filesystem::path> path = relative_to_root (
boost::filesystem::canonical (root),
boost::filesystem::canonical (_file.get())
);
if (!path) {
/* The path of this asset is not within our DCP, so we assume it's an external
(referenced) one.
*/
return;
}
pkl->add_asset (_id, _id, hash(), boost::filesystem::file_size (_file.get()), pkl_type (pkl->standard()));
}
void
Asset::write_to_assetmap (xmlpp::Node* node, boost::filesystem::path root) const
{
DCP_ASSERT (_file);
write_file_to_assetmap (node, root, _file.get(), _id);
}
void
Asset::write_file_to_assetmap (xmlpp::Node* node, boost::filesystem::path root, boost::filesystem::path file, string id)
{
optional<boost::filesystem::path> path = relative_to_root (
boost::filesystem::canonical (root),
boost::filesystem::canonical (file)
);
if (!path) {
/* The path of this asset is not within our DCP, so we assume it's an external
(referenced) one.
*/
return;
}
xmlpp::Node* asset = node->add_child ("Asset");
asset->add_child("Id")->add_child_text ("urn:uuid:" + id);
xmlpp::Node* chunk_list = asset->add_child ("ChunkList");
xmlpp::Node* chunk = chunk_list->add_child ("Chunk");
chunk->add_child("Path")->add_child_text (path.get().generic_string());
chunk->add_child("VolumeIndex")->add_child_text ("1");
chunk->add_child("Offset")->add_child_text ("0");
chunk->add_child("Length")->add_child_text (raw_convert<string> (boost::filesystem::file_size (file)));
}
string
Asset::hash (function<void (float)> progress) const
{
DCP_ASSERT (_file);
if (!_hash) {
_hash = make_digest (_file.get(), progress);
}
return _hash.get();
}
bool
Asset::equals (boost::shared_ptr<const Asset> other, EqualityOptions, NoteHandler note) const
{
if (_hash != other->_hash) {
note (DCP_ERROR, "Asset: hashes differ");
return false;
}
return true;
}
/** Set the file that holds this asset on disk. Calling this function
* clears this object's store of its hash, so you should call ::hash
* after this.
*
* @param file New file's path.
*/
void
Asset::set_file (boost::filesystem::path file) const
{
_file = boost::filesystem::absolute (file);
_hash = optional<string> ();
}
void
Asset::set_hash (string hash)
{
_hash = hash;
}
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